The only difference between use and abuse of drugs is the quantity of drugs taken

After listening to a lecture on prejudice, a student wonders if having close friends from different ethnic groups can reduce prejudice against these groups. Research suggests that the answer is

a. yes, because such friendships will help to reinforce in-group biases. b. yes, because it may become easier to identify and empathize with out-group members. c. no, because these friendships may foster a process of social categorization. d. no, because the less that is known about the social norms and customs of out-groups, the better.

Research indicates that the pattern of genetic and environmental influences ______

a. shows no effects from genetic influences on either normal or abnormal traits b. shows much stronger genetic influences on abnormal traits than on normal ones c. was similar for both abnormal and normal traits d. shows much stronger genetic influences on normal traits than on abnormal ones